Flftfcprodfing composition



comma on Pusnc' 25 ing mixed to UNITED STATES SUBSTITUTED FOR MlSSlNG COPY} PATENT OFFICE.

FIDREPROOFING COMPOSITION.

SPECIFICATION forming part of Letters Patent No; 289,022, dated November 27,1883.

Application filed February 10,1883.

To all whom, it may concern:

, Be it known that I, J on): H. NOLAN, a citizen of the United States, residing at Boston, in the county of Sull'olk and State of Massachusetts, have invented certain new and useful Improvements in Fire-Proof Compositions; and I do hereby declare that the same are fully described in thefollowing specification.

' This invention relates to improvements in fire-proof eoinpositions,-a11d 'it is especially well adapted as a fire-proof lining for safes, vaults, cash-boxes, and similar objects, although it is equally well adapted-for other purposes where a lire-proof material is required.

[5 The composition consists of asbestus in its natural form, carrying l]l2l "ll('Slit or 0th fractory matter, which is groi and mixed with marl or its equiva en such as talc, (r sum, or material of a kindred na turein alEout the following proportions, viz; from one-half to three-iburths of asbestus, as aforesaid, and from onc'ha-lf to olie foiir th of ml, or its equivalent, all the ingredients being properly round or mlverized before he- "ether. W mn'its"hi-"eipi=6bi"i-''-" s .1 ice is sufficient for the object sought to be attained, the amount of asbestos may be reduced and the other material or materials increased proportionally. After the 'asbestus and the other ingredients have been well mixed together, I saturate the mixture in a solution oi silicate of soda, or its equivalent, suc 1 as chloride of calcium, or alum, or borax, or tung state ot soda singlyor combined, or solutions 5 indred nature.

(No specimens.)

Examiner The asbestns compound, after being properly saturated with the solution or solutions aforesaid, forms a more or less pasty composition, which is welladapted for filling safe or vault walls and doors, and when so applied it forms a strongly fireproof and fire-resisting material. It so desired, the composition may be made stiff enough to allow it to bcmolded in the form of tiles or bricks, which are allowed to set and harden; or it may be made sulfieiently liquid to admit of its being applied by means of a brush to the surface of the object that is to be made fire-proof.

This improved composition, besides being fire-resisting, is also an excellent non-conductor for heat, and it may therefore to great ad- .its described cquiva cut, as hereinabove set forth and specified.

In testimony whereof I h we aflixed my signature in presence of two vitnesses.

JOHN H. NOLAN.

Vitnesses:

Ann-m ANDREN, HENRY CIIADBOURZS. 

